Search results for " Oriente"
showing 10 items of 184 documents
The ´champagne-cup` period at Carchemish. A review of the Early Bronze Age levels on the Acropolis Mound and the problem of the Inner Town.
2007
The pioneer excavations conducted by the British Museum expedition at the famous site of Carchemish in the 1910’s brought to light a large number of buildings, sculptures and inscriptions which provide an outline of the urban layout of the Iron Age city and its monuments. While many scholars have often attempted to re-examine the epigraphic material as well as the style and chronology of the major works of this period in order to set them in a proper historical context, much less attention has been paid to the earlier levels mainly uncovered on the Acropolis mound, ranging from the Neolithic to the Bronze Age. This paper discusses the archaeological evidence available and attempted to recon…
Dynamical Compensation of the Load Torque in a High-Performance Electrical Drive with an Induction Motor
2018
This paper describes a new method for dynamical estimation of load disturbance in induction motors by using Nonlinear Unknown Input Observers (NUIO). This estimation is then used to compensate dynamically the load torque in a Field Oriented Control (FOC) induction motor drive to increase its load-rejection capability. The method has been verified both in simulation and experimentally on a experimental rig.
Neural based MRAS sensorless techniques for high performance linear induction motor drives.
2010
This paper proposes a neural based MRAS (Model reference Adaptive System) speed observer suited for linear induction motors (LIM). Starting from the dynamical equation of the LIM in the synchronous reference frame in literature, the so-called voltage and current models of the LIM in the stationary reference frame, taking into consideration the end effects, have been deduced. Then, while the inductor equations have been used as reference model of the MRAS observer, the induced part equations have been discretized and rearranged so to be represented by a linear neural network (ADALINE). On this basis, the so called TLS EXIN neuron has been used to compute on-line, in recursive form, the machi…
The Culture on the Palm of Your Hand: How to Design a User Oriented Mobile App for Museums
2014
The increased usage of mobile apps has a great potential for the tourism industry. Through the use of mobile apps, web portals and social media may allow a fast and wide diffusion of awareness for museum and attract a large number of visitors, thus increasing the value of their image, with moderate investments. The aim of this chapter is to identify the key factors as antecedents of customer satisfaction for the design of a mobile app for a museum. To this aim, the authors use the Kano model that allows categorizing service attributes according to how they are perceived by customers and estimating their impact on customer satisfaction. This model is adopted in order to identify express and …
Graduate of Riga Polytechnic Institute, Engineer, Inventor and Athlete Arno Līcis
2019
The article summarizes the career of a graduate of the Faculty of Mechanics (1964) of Riga Polytechnic Institute Arno Līcis. The article reveals and describes his work while being an engineer at the Riga Electromachine Building Factory (RER), at the Latvian Scientific Research Institute of Trauma- tology and Orthopaedics (LSRITO) and in the printing house «Jāņa sēta», as well as being an inventor. It has been discovered that he had promoted orienteering sports and had significant achievements in competitions of various scale, inclu- ding mass competition named «Magnēts» managed by him, which had been taking place since 1969. This is the first research on the life and professional activities…
An Object-Oriented Approach to Discrete-Event Simulation Applied to Underground Railway Systems
1999
This paper describes the implementation of an object-oriented simulator that supports the determination of timetables and the design of on-line control policies for underground rail way systems. The simulator has been developed on the basis of a new approach to object- oriented modelling. Such an approach has been used to design a development tool that supports the generation of simulation codes and is able to automatically define the skeleton of a code.
Promotion of polygeneration for buildings applications through sector- and user-oriented “high efficiency CHP” eligibility criteria
2014
Abstract The eligibility criteria adopted to assess polygeneration plants as “highly efficient” can play a determinant role in favouring or discouraging the market growth of polygeneration systems, especially for buildings applications where economic viability is often more difficult to achieve. Based on the current European framework, in this paper the opportunity to adopt sector- and user-oriented criteria is discussed. After having identified three buildings with different uses (a large hotel, a hospital and an office building), the optimal lay-out and operation strategy of a polygeneration plant serving each building is determined; then, ex-post processing of economic and energetic resu…
Urban Orienteering Competitions – A Unique Activity of Didactic Communication
2014
Abstract The aim of our project was to deepen understanding of the legacy of our predecessors, which are to be found in the historical centre of Sibiu, to develop map reading skills using the techniques and rules of orienteering. Most students participated enthusiastically in the search for historical sights and found the activity extremely attractive. Moreover, both the preparation stage, when the students learnt all together or in groups how to use a map in order to locate the historical sights, and the follow-up stage, when they disseminated the results, contributed to developing team spirit and a sense of belonging. Communication among students and with the form teacher also improved an…
Using and Extending the SPEM Specifications to Represent Agent Oriented Methodologies
2009
Situational Method Engineering used for constructing ad-hoc agent oriented design processes is grounded on a well defined set of phases that are principally based on reuse of components coming from existing agent design processes; these components have to be stored in a repository. The identification and extraction of these components could take large advantages from the existence of a standardized representation of the design processes they come from. In this paper we illustrate our solution based on SPEM 2.0 specifications for modelling agent design processes and extending them when necessary to meet the specific needs we faced in our experiments.
Sliding mode torque control of an induction motor for automotive application with sliding mode flux observer
2016
In this paper, the performance of two control systems of induction motors for automotive applications were compared in order to highlight the differences in terms of response speed, robustness and noise immunity. The first system is realized through a field-oriented control with PI controllers, while the second system is realized through a field-oriented control with Sliding Mode Controllers. Both controls are designed to follow the torque references as required for the vehicles and are tested with typical load profiles of vehicles. It also designed a sliding mode observer flux.